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Example 12: Generate an FSK Modulated Waveform
Generate an FSK modulated waveform with a 200 Hz key frequency. The carrier is a sine wave
with a 10 kHz frequency and the hop frequency is 500 Hz.
⚫ Set the frequency, amplitude and offset of the carrier wave.
1. Press Waveforms and choose the sine waveform as the carrier wave.
2. Press Frequency/Period and choose Frequency which will display in a blue color. Input ’10’
from the keyboard and choose the unit ‘kHz’ to set the frequency to 10 kHz.
3. Press Amplitude/HighLevel and choose Amplitude which will display in a blue color. Input
’5’ from the keyboard and choose the unit ‘Vpp’ to set the amplitude to 5 Vpp.
4. Press Offset/LowLevel and choose Offset which will display in a blue color. Input ’0’ from
the keyboard and choose the unit ‘Vdc’ to set the offset to 0 V DC.
⚫ Set the modulation type FSK and its parameters.
1. Press Mod → Type → FSK and choose FSK. The message shown on the middle left side of the
screen is ‘FSK’.
2. Press Key Freq, input ’200’ from the keyboard and choose the unit ‘Hz’ to set the key
frequency to 200 Hz.
3. Press Hop Freq, input ‘500’ from the keyboard and choose the unit ‘Hz’ to set the hop
frequency to 500 Hz.
When all parameters above are set, the waveform generated is shown in Figure 85.
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